I find that question a fairly tough one to answer myself. I have before pondered over this thought of how much I can be pointed as guilty of my current life circumstances and I am yet to arrive at a conclusion.
I have been through lots of traumas throughout my life, since my childhood. That surely was out of my control and surely has had an immense negative impact on me. During the somewhat peaceful moments in between those traumatic events, I failed to function properly and sabotaged myself; I submerged into vices and addictions, which still affect me to the present day. I think now, "Was I sabotaging myself only a feat of my own doing or have my traumas, which were out of my control, guided me in that disruptive direction? If the latter is true, then I, again, had little to no control over the path my life was walking upon. It is as if it all has been a continuous string of traumas, and I actually had no moments of sobriety..."
Yours is a hard question to answer, at least it is to me. Even if you now know (emphasis on "now") that you could have acted differently on certain moments of your life, at those times you were actually living in the moment, which is completely different from thinking about them in retrospection; back then, your mind, your reasonings, and your ability to think clearly were likely all clouded.